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Thin-Film Photovoltaics

Thin-film photovoltaics (TFPVs) are being developed as a lower-cost alternative to silicon-wafer-based products. The three main categories of TFPVs are named after their active-layer components: thin silicon, II-VI (primarily CdTe), and CIGS (copper indium gallium selenide.) Each thin-film photovoltaic cell exists as an active layer on top of a transparent conductive oxide (TCO) on top of a substrate (usually glass or metal).

Measuring Photovoltaic Active Layers

Getting the right composition and thickness measurement of photovoltaic active layers is important. Being too thin can affect efficiency and durability, while being too thick can increase cost. The wrong composition of the photovoltaic layers can drastically decrease efficiency and manufacturing yield.

Filmetrics^® F20 models are used by dozens of TFPV manufacturers to measure the thickness and optical constants of all three types of photovoltaic active layers. To measure photovoltaic active layers on top of TCO, Filmetrics has extensive experience characterizing both in-house and glass-supplier single or multi-layer TCO stacks.

Other Process Films

There are other films, besides active layers and TCO stacks, that are often used in the manufacture of TFPVs. Examples include polyimides and resists used to define cells and electrodes, as well as anti-reflection coatings. In each case Filmetrics has a tabletop, mapping, or in-line solution readily available.

To discuss your solar photovoltaic application, contact our thin-film experts. Filmetrics offers free trial measurements - results are typically available in 1-2 days.